2 Copyright (C) 2012-2020 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/lib/util.cc
22 * @brief Some utility functions and classes.
26 #include "exceptions.h"
27 #include "dcp_content_type.h"
29 #include "cinema_sound_processor.h"
34 #include "video_content.h"
37 #include "audio_processor.h"
39 #include "compose.hpp"
40 #include "audio_buffers.h"
41 #include "string_text.h"
43 #include "render_text.h"
44 #include "ffmpeg_image_proxy.h"
46 #include "text_decoder.h"
47 #include "job_manager.h"
49 #include <dcp/decrypted_kdm.h>
50 #include <dcp/locale_convert.h>
52 #include <dcp/raw_convert.h>
53 #include <dcp/picture_asset.h>
54 #include <dcp/sound_asset.h>
55 #include <dcp/subtitle_asset.h>
56 #include <dcp/atmos_asset.h>
58 #include <libavfilter/avfilter.h>
59 #include <libavformat/avformat.h>
60 #include <libavcodec/avcodec.h>
62 #include <curl/curl.h>
64 #include <pangomm/init.h>
65 #include <boost/algorithm/string.hpp>
66 #include <boost/range/algorithm/replace_if.hpp>
67 #include <boost/thread.hpp>
68 #include <boost/filesystem.hpp>
69 #include <boost/locale.hpp>
70 #ifdef DCPOMATIC_WINDOWS
71 #include <boost/locale.hpp>
80 #ifdef DCPOMATIC_POSIX
101 using std::bad_alloc;
102 using std::set_terminate;
103 using std::make_pair;
104 using boost::shared_ptr;
106 using boost::optional;
107 using boost::lexical_cast;
108 using boost::bad_lexical_cast;
109 using boost::scoped_array;
111 using dcp::raw_convert;
112 using dcp::locale_convert;
113 using namespace dcpomatic;
115 /** Path to our executable, required by the stacktrace stuff and filled
116 * in during App::onInit().
119 bool is_batch_converter = false;
120 static boost::thread::id ui_thread;
121 static boost::filesystem::path backtrace_file;
123 /** Convert some number of seconds to a string representation
124 * in hours, minutes and seconds.
127 * @return String of the form H:M:S (where H is hours, M
128 * is minutes and S is seconds).
131 seconds_to_hms (int s)
139 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d", h, m, s);
144 time_to_hmsf (DCPTime time, Frame rate)
146 Frame f = time.frames_round (rate);
155 snprintf (buffer, sizeof(buffer), "%d:%02d:%02d.%d", h, m, s, static_cast<int>(f));
159 /** @param s Number of seconds.
160 * @return String containing an approximate description of s (e.g. "about 2 hours")
163 seconds_to_approximate_hms (int s)
173 bool minutes = h < 6 && m > 0;
174 bool seconds = h == 0 && m < 10 && s > 0;
176 if (m > 30 && !minutes) {
177 /* round up the hours */
180 if (s > 30 && !seconds) {
181 /* round up the minutes */
191 /// TRANSLATORS: h here is an abbreviation for hours
192 ap += locale_convert<string>(h) + _("h");
194 if (minutes || seconds) {
200 /// TRANSLATORS: m here is an abbreviation for minutes
201 ap += locale_convert<string>(m) + _("m");
210 /// TRANSLATORS: s here is an abbreviation for seconds
211 ap += locale_convert<string>(s) + _("s");
218 seconds (struct timeval t)
220 return t.tv_sec + (double (t.tv_usec) / 1e6);
223 #ifdef DCPOMATIC_WINDOWS
225 /** Resolve symbol name and source location given the path to the executable */
227 addr2line (void const * const addr)
229 char addr2line_cmd[512] = { 0 };
230 sprintf (addr2line_cmd, "addr2line -f -p -e %.256s %p > %s", program_name.c_str(), addr, backtrace_file.string().c_str());
231 return system(addr2line_cmd);
234 /** This is called when C signals occur on Windows (e.g. SIGSEGV)
235 * (NOT C++ exceptions!). We write a backtrace to backtrace_file by dark means.
236 * Adapted from code here: http://spin.atomicobject.com/2013/01/13/exceptions-stack-traces-c/
239 exception_handler(struct _EXCEPTION_POINTERS * info)
241 FILE* f = fopen_boost (backtrace_file, "w");
242 fprintf (f, "C-style exception %d\n", info->ExceptionRecord->ExceptionCode);
245 if (info->ExceptionRecord->ExceptionCode != EXCEPTION_STACK_OVERFLOW) {
246 CONTEXT* context = info->ContextRecord;
247 SymInitialize (GetCurrentProcess (), 0, true);
249 STACKFRAME frame = { 0 };
251 /* setup initial stack frame */
253 frame.AddrPC.Offset = context->Rip;
254 frame.AddrStack.Offset = context->Rsp;
255 frame.AddrFrame.Offset = context->Rbp;
257 frame.AddrPC.Offset = context->Eip;
258 frame.AddrStack.Offset = context->Esp;
259 frame.AddrFrame.Offset = context->Ebp;
261 frame.AddrPC.Mode = AddrModeFlat;
262 frame.AddrStack.Mode = AddrModeFlat;
263 frame.AddrFrame.Mode = AddrModeFlat;
267 IMAGE_FILE_MACHINE_I386,
268 GetCurrentProcess (),
273 SymFunctionTableAccess,
278 addr2line((void *) frame.AddrPC.Offset);
282 addr2line ((void *) info->ContextRecord->Rip);
284 addr2line ((void *) info->ContextRecord->Eip);
288 return EXCEPTION_CONTINUE_SEARCH;
293 set_backtrace_file (boost::filesystem::path p)
298 /** This is called when there is an unhandled exception. Any
299 * backtrace in this function is useless on Windows as the stack has
300 * already been unwound from the throw; we have the gdb wrap hack to
307 static bool tried_throw = false;
308 // try once to re-throw currently active exception
314 catch (const std::exception &e) {
315 std::cerr << __FUNCTION__ << " caught unhandled exception. what(): "
316 << e.what() << std::endl;
319 std::cerr << __FUNCTION__ << " caught unknown/unhandled exception."
327 dcpomatic_setup_path_encoding ()
329 #ifdef DCPOMATIC_WINDOWS
330 /* Dark voodoo which, I think, gets boost::filesystem::path to
331 correctly convert UTF-8 strings to paths, and also paths
332 back to UTF-8 strings (on path::string()).
334 After this, constructing boost::filesystem::paths from strings
335 converts from UTF-8 to UTF-16 inside the path. Then
336 path::string().c_str() gives UTF-8 and
337 path::c_str() gives UTF-16.
339 This is all Windows-only. AFAICT Linux/OS X use UTF-8 everywhere,
340 so things are much simpler.
342 std::locale::global (boost::locale::generator().generate (""));
343 boost::filesystem::path::imbue (std::locale ());
347 /** Call the required functions to set up DCP-o-matic's static arrays, etc.
348 * Must be called from the UI thread, if there is one.
353 #ifdef DCPOMATIC_WINDOWS
354 boost::filesystem::path p = g_get_user_config_dir ();
355 p /= "backtrace.txt";
356 set_backtrace_file (p);
357 SetUnhandledExceptionFilter(exception_handler);
360 DCPOMATIC_DISABLE_WARNINGS
362 avfilter_register_all ();
363 DCPOMATIC_ENABLE_WARNINGS
366 /* Add our library directory to the libltdl search path so that
367 xmlsec can find xmlsec1-openssl.
369 boost::filesystem::path lib = directory_containing_executable().parent_path();
371 setenv ("LTDL_LIBRARY_PATH", lib.c_str (), 1);
374 set_terminate (terminate);
376 #ifdef DCPOMATIC_WINDOWS
377 putenv ("PANGOCAIRO_BACKEND=fontconfig");
378 putenv (String::compose("FONTCONFIG_PATH=%1", shared_path().string()).c_str());
382 setenv ("PANGOCAIRO_BACKEND", "fontconfig", 1);
383 setenv ("FONTCONFIG_PATH", shared_path().string().c_str(), 1);
389 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
390 /* Render something to fontconfig to create its cache */
391 list<StringText> subs;
392 dcp::SubtitleString ss(
393 optional<string>(), false, false, false, dcp::Colour(), 42, 1, dcp::Time(), dcp::Time(), 0, dcp::HALIGN_CENTER, 0, dcp::VALIGN_CENTER, dcp::DIRECTION_LTR,
394 "Hello dolly", dcp::NONE, dcp::Colour(), dcp::Time(), dcp::Time()
396 subs.push_back (StringText(ss, 0));
397 render_text (subs, list<shared_ptr<Font> >(), dcp::Size(640, 480), DCPTime(), 24);
400 Ratio::setup_ratios ();
401 PresetColourConversion::setup_colour_conversion_presets ();
402 DCPContentType::setup_dcp_content_types ();
403 Filter::setup_filters ();
404 CinemaSoundProcessor::setup_cinema_sound_processors ();
405 AudioProcessor::setup_audio_processors ();
407 curl_global_init (CURL_GLOBAL_ALL);
409 ui_thread = boost::this_thread::get_id ();
412 #ifdef DCPOMATIC_WINDOWS
413 boost::filesystem::path
417 GetModuleFileName (0, buffer, 512 * sizeof(wchar_t));
418 boost::filesystem::path p (buffer);
419 p = p.parent_path ();
420 p = p.parent_path ();
427 boost::filesystem::path
430 return "DCP-o-matic 2.app/Contents/Resources";
435 dcpomatic_setup_gettext_i18n (string lang)
437 #ifdef DCPOMATIC_LINUX
441 if (!lang.empty ()) {
442 /* Override our environment language. Note that the caller must not
443 free the string passed into putenv().
445 string s = String::compose ("LANGUAGE=%1", lang);
446 putenv (strdup (s.c_str ()));
447 s = String::compose ("LANG=%1", lang);
448 putenv (strdup (s.c_str ()));
449 s = String::compose ("LC_ALL=%1", lang);
450 putenv (strdup (s.c_str ()));
453 setlocale (LC_ALL, "");
454 textdomain ("libdcpomatic2");
456 #if defined(DCPOMATIC_WINDOWS) || defined(DCPOMATIC_OSX)
457 bindtextdomain ("libdcpomatic2", mo_path().string().c_str());
458 bind_textdomain_codeset ("libdcpomatic2", "UTF8");
461 #ifdef DCPOMATIC_LINUX
462 bindtextdomain ("libdcpomatic2", LINUX_LOCALE_PREFIX);
466 /** Compute a digest of the first and last `size' bytes of a set of files. */
468 digest_head_tail (vector<boost::filesystem::path> files, boost::uintmax_t size)
470 boost::scoped_array<char> buffer (new char[size]);
474 boost::uintmax_t to_do = size;
475 char* p = buffer.get ();
477 while (i < int64_t (files.size()) && to_do > 0) {
478 FILE* f = fopen_boost (files[i], "rb");
480 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
483 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
484 checked_fread (p, this_time, f, files[i]);
491 digester.add (buffer.get(), size - to_do);
496 i = files.size() - 1;
497 while (i >= 0 && to_do > 0) {
498 FILE* f = fopen_boost (files[i], "rb");
500 throw OpenFileError (files[i].string(), errno, OpenFileError::READ);
503 boost::uintmax_t this_time = min (to_do, boost::filesystem::file_size (files[i]));
504 dcpomatic_fseek (f, -this_time, SEEK_END);
505 checked_fread (p, this_time, f, files[i]);
512 digester.add (buffer.get(), size - to_do);
514 return digester.get ();
517 /** Round a number up to the nearest multiple of another number.
519 * @param stride Array of numbers to round, indexed by c.
520 * @param t Multiple to round to.
521 * @return Rounded number.
524 stride_round_up (int c, int const * stride, int t)
526 int const a = stride[c] + (t - 1);
530 /** Trip an assert if the caller is not in the UI thread */
534 DCPOMATIC_ASSERT (boost::this_thread::get_id() == ui_thread);
538 audio_channel_name (int c)
540 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
542 /// TRANSLATORS: these are the names of audio channels; Lfe (sub) is the low-frequency
543 /// enhancement channel (sub-woofer).
544 string const channels[] = {
551 _("Hearing impaired"),
552 _("Visually impaired"),
555 _("Left rear surround"),
556 _("Right rear surround"),
558 _("D-BOX secondary"),
567 short_audio_channel_name (int c)
569 DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);
571 /// TRANSLATORS: these are short names of audio channels; Lfe is the low-frequency
572 /// enhancement channel (sub-woofer). HI is the hearing-impaired audio track and
573 /// VI is the visually-impaired audio track (audio describe). DBP is the D-BOX
574 /// primary channel and DBS is the D-BOX secondary channel.
575 string const channels[] = {
599 valid_image_file (boost::filesystem::path f)
601 if (boost::starts_with (f.leaf().string(), "._")) {
605 string ext = f.extension().string();
606 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
608 ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" ||
609 ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".dpx" ||
610 ext == ".j2c" || ext == ".j2k" || ext == ".jp2" || ext == ".exr" ||
616 valid_sound_file (boost::filesystem::path f)
618 if (boost::starts_with (f.leaf().string(), "._")) {
622 string ext = f.extension().string();
623 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
624 return (ext == ".wav" || ext == ".mp3" || ext == ".aif" || ext == ".aiff");
628 valid_j2k_file (boost::filesystem::path f)
630 string ext = f.extension().string();
631 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
632 return (ext == ".j2k" || ext == ".j2c" || ext == ".jp2");
636 tidy_for_filename (string f)
638 boost::replace_if (f, boost::is_any_of ("\\/:"), '_');
643 fit_ratio_within (float ratio, dcp::Size full_frame)
645 if (ratio < full_frame.ratio ()) {
646 return dcp::Size (lrintf (full_frame.height * ratio), full_frame.height);
649 return dcp::Size (full_frame.width, lrintf (full_frame.width / ratio));
653 wrapped_av_malloc (size_t s)
655 void* p = av_malloc (s);
663 split_get_request (string url)
666 AWAITING_QUESTION_MARK,
669 } state = AWAITING_QUESTION_MARK;
671 map<string, string> r;
674 for (size_t i = 0; i < url.length(); ++i) {
676 case AWAITING_QUESTION_MARK:
691 r.insert (make_pair (k, v));
701 if (state == VALUE) {
702 r.insert (make_pair (k, v));
709 video_asset_filename (shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, optional<string> summary)
711 dcp::NameFormat::Map values;
713 values['r'] = raw_convert<string> (reel_index + 1);
714 values['n'] = raw_convert<string> (reel_count);
716 values['c'] = careful_string_filter (summary.get());
718 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
722 audio_asset_filename (shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, optional<string> summary)
724 dcp::NameFormat::Map values;
726 values['r'] = raw_convert<string> (reel_index + 1);
727 values['n'] = raw_convert<string> (reel_count);
729 values['c'] = careful_string_filter (summary.get());
731 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
736 atmos_asset_filename (shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, optional<string> summary)
738 dcp::NameFormat::Map values;
739 values['t'] = "atmos";
740 values['r'] = raw_convert<string> (reel_index + 1);
741 values['n'] = raw_convert<string> (reel_count);
743 values['c'] = careful_string_filter (summary.get());
745 return Config::instance()->dcp_asset_filename_format().get(values, "_" + asset->id() + ".mxf");
750 relaxed_string_to_float (string s)
753 boost::algorithm::replace_all (s, ",", ".");
754 return lexical_cast<float> (s);
755 } catch (bad_lexical_cast &) {
756 boost::algorithm::replace_all (s, ".", ",");
757 return lexical_cast<float> (s);
762 careful_string_filter (string s)
764 /* Filter out `bad' characters which `may' cause problems with some systems (either for DCP name or filename).
765 There's no apparent list of what really is allowed, so this is a guess.
766 Safety first and all that.
769 wstring ws = boost::locale::conv::utf_to_utf<wchar_t>(s);
772 string const allowed = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_%.+";
773 for (size_t i = 0; i < ws.size(); ++i) {
777 /* Remove some accents */
778 if (wstring(L"áà â").find(c) != string::npos) {
781 if (wstring(L"éèêë").find(c) != string::npos) {
784 if (wstring(L"ö").find(c) != string::npos) {
787 if (wstring(L"ü").find(c) != string::npos) {
791 if (allowed.find(c) != string::npos) {
796 return boost::locale::conv::utf_to_utf<char>(out);
799 /** @param mapped List of mapped audio channels from a Film.
800 * @param channels Total number of channels in the Film.
801 * @return First: number of non-LFE soundtrack channels (L/R/C/Ls/Rs/Lc/Rc/Bsl/Bsr), second: number of LFE channels.
804 audio_channel_types (list<int> mapped, int channels)
809 BOOST_FOREACH (int i, mapped) {
811 /* This channel is mapped but is not included in the DCP */
815 switch (static_cast<dcp::Channel>(i)) {
836 return make_pair (non_lfe, lfe);
839 shared_ptr<AudioBuffers>
840 remap (shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map)
842 shared_ptr<AudioBuffers> mapped (new AudioBuffers (output_channels, input->frames()));
843 mapped->make_silent ();
845 int to_do = min (map.input_channels(), input->channels());
847 for (int i = 0; i < to_do; ++i) {
848 for (int j = 0; j < mapped->channels(); ++j) {
849 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
850 mapped->accumulate_channel (
853 static_cast<dcp::Channel> (j),
854 map.get (i, static_cast<dcp::Channel> (j))
864 increment_eyes (Eyes e)
866 if (e == EYES_LEFT) {
874 checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path)
876 size_t N = fwrite (ptr, 1, size, stream);
878 if (ferror(stream)) {
880 throw FileError (String::compose("fwrite error %1", errno), path);
883 throw FileError ("Unexpected short write", path);
889 checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path)
891 size_t N = fread (ptr, 1, size, stream);
893 if (ferror(stream)) {
895 throw FileError (String::compose("fread error %1", errno), path);
898 throw FileError ("Unexpected short read", path);
904 utf8_strlen (string s)
906 size_t const len = s.length ();
908 for (size_t i = 0; i < len; ++i) {
909 unsigned char c = s[i];
910 if ((c & 0xe0) == 0xc0) {
912 } else if ((c & 0xf0) == 0xe0) {
914 } else if ((c & 0xf8) == 0xf0) {
923 day_of_week_to_string (boost::gregorian::greg_weekday d)
925 switch (d.as_enum()) {
926 case boost::date_time::Sunday:
928 case boost::date_time::Monday:
930 case boost::date_time::Tuesday:
932 case boost::date_time::Wednesday:
933 return _("Wednesday");
934 case boost::date_time::Thursday:
935 return _("Thursday");
936 case boost::date_time::Friday:
938 case boost::date_time::Saturday:
939 return _("Saturday");
942 return d.as_long_string ();
945 /** @param size Size of picture that the subtitle will be overlaid onto */
947 emit_subtitle_image (ContentTimePeriod period, dcp::SubtitleImage sub, dcp::Size size, shared_ptr<TextDecoder> decoder)
949 /* XXX: this is rather inefficient; decoding the image just to get its size */
950 FFmpegImageProxy proxy (sub.png_image());
951 shared_ptr<Image> image = proxy.image().image;
952 /* set up rect with height and width */
953 dcpomatic::Rect<double> rect(0, 0, image->size().width / double(size.width), image->size().height / double(size.height));
955 /* add in position */
957 switch (sub.h_align()) {
958 case dcp::HALIGN_LEFT:
959 rect.x += sub.h_position();
961 case dcp::HALIGN_CENTER:
962 rect.x += 0.5 + sub.h_position() - rect.width / 2;
964 case dcp::HALIGN_RIGHT:
965 rect.x += 1 - sub.h_position() - rect.width;
969 switch (sub.v_align()) {
970 case dcp::VALIGN_TOP:
971 rect.y += sub.v_position();
973 case dcp::VALIGN_CENTER:
974 rect.y += 0.5 + sub.v_position() - rect.height / 2;
976 case dcp::VALIGN_BOTTOM:
977 rect.y += 1 - sub.v_position() - rect.height;
981 decoder->emit_bitmap (period, image, rect);
985 show_jobs_on_console (bool progress)
991 dcpomatic_sleep_seconds (5);
993 list<shared_ptr<Job> > jobs = JobManager::instance()->get();
995 if (!first && progress) {
996 for (size_t i = 0; i < jobs.size(); ++i) {
997 cout << "\033[1A\033[2K";
1004 BOOST_FOREACH (shared_ptr<Job> i, jobs) {
1007 if (!i->sub_name().empty()) {
1008 cout << "; " << i->sub_name();
1012 if (i->progress ()) {
1013 cout << i->status() << " \n";
1015 cout << ": Running \n";
1019 if (!progress && i->finished_in_error()) {
1020 /* We won't see this error if we haven't been showing progress,
1023 cout << i->status() << "\n";
1026 if (i->finished_in_error()) {
1031 if (!JobManager::instance()->work_to_do()) {
1039 /** XXX: could use mmap? */
1041 copy_in_bits (boost::filesystem::path from, boost::filesystem::path to, boost::function<void (float)> progress)
1043 FILE* f = fopen_boost (from, "rb");
1045 throw OpenFileError (from, errno, OpenFileError::READ);
1047 FILE* t = fopen_boost (to, "wb");
1050 throw OpenFileError (to, errno, OpenFileError::WRITE);
1053 /* on the order of a second's worth of copying */
1054 boost::uintmax_t const chunk = 20 * 1024 * 1024;
1056 uint8_t* buffer = static_cast<uint8_t*> (malloc(chunk));
1058 throw std::bad_alloc ();
1061 boost::uintmax_t const total = boost::filesystem::file_size (from);
1062 boost::uintmax_t remaining = total;
1065 boost::uintmax_t this_time = min (chunk, remaining);
1066 size_t N = fread (buffer, 1, chunk, f);
1067 if (N < this_time) {
1071 throw ReadFileError (from, errno);
1074 N = fwrite (buffer, 1, this_time, t);
1075 if (N < this_time) {
1079 throw WriteFileError (to, errno);
1082 progress (1 - float(remaining) / total);
1083 remaining -= this_time;
1091 #ifdef DCPOMATIC_VARIANT_SWAROOP
1093 /* Make up a key from the machine UUID */
1097 dcp::Data key (dcpomatic::crypto_key_length());
1098 memset (key.data().get(), 0, key.size());
1099 string const magic = command_and_read ("dcpomatic2_uuid");
1100 strncpy ((char *) key.data().get(), magic.c_str(), dcpomatic::crypto_key_length());
1104 /* swaroop chain file format:
1106 * 0 [int16_t] IV length
1107 * 2 [int16_t] cert #1 length, or 0 for none
1108 * 4 [int16_t] cert #2 length, or 0 for none
1109 * 6 [int16_t] cert #3 length, or 0 for none
1110 * 8 [int16_t] cert #4 length, or 0 for none
1111 * 10 [int16_t] cert #5 length, or 0 for none
1112 * 12 [int16_t] cert #6 length, or 0 for none
1113 * 14 [int16_t] cert #7 length, or 0 for none
1114 * 16 [int16_t] cert #8 length, or 0 for none
1115 * 16 [int16_t] private key length
1128 struct __attribute__ ((packed)) Header_ {
1130 int16_t cert_length[8];
1131 int16_t private_key_length;
1134 typedef struct Header_ Header;
1136 shared_ptr<dcp::CertificateChain>
1137 read_swaroop_chain (boost::filesystem::path path)
1139 dcp::Data data (path);
1140 Header* header = (Header *) data.data().get();
1141 uint8_t* p = data.data().get() + sizeof(Header);
1143 dcp::Data iv (p, header->iv_length);
1146 shared_ptr<dcp::CertificateChain> cc (new dcp::CertificateChain());
1147 for (int i = 0; i < 8; ++i) {
1148 if (header->cert_length[i] == 0) {
1151 dcp::Data c(p, header->cert_length[i]);
1153 cc->add (dcp::Certificate(dcpomatic::decrypt(c, key_from_uuid(), iv)));
1156 dcp::Data k (p, header->private_key_length);
1157 cc->set_key (dcpomatic::decrypt(k, key_from_uuid(), iv));
1162 write_swaroop_chain (shared_ptr<const dcp::CertificateChain> chain, boost::filesystem::path output)
1164 scoped_array<uint8_t> buffer (new uint8_t[65536]);
1165 Header* header = (Header *) buffer.get();
1166 memset (header, 0, sizeof(Header));
1167 uint8_t* p = buffer.get() + sizeof(Header);
1169 dcp::Data iv = dcpomatic::random_iv ();
1170 header->iv_length = iv.size ();
1171 memcpy (p, iv.data().get(), iv.size());
1175 BOOST_FOREACH (dcp::Certificate i, chain->root_to_leaf()) {
1176 dcp::Data e = dcpomatic::encrypt (i.certificate(true), key_from_uuid(), iv);
1177 memcpy (p, e.data().get(), e.size());
1179 DCPOMATIC_ASSERT (N < 8);
1180 header->cert_length[N] = e.size ();
1184 dcp::Data k = dcpomatic::encrypt (chain->key().get(), key_from_uuid(), iv);
1185 memcpy (p, k.data().get(), k.size());
1187 header->private_key_length = k.size ();
1189 FILE* f = fopen_boost (output, "wb");
1190 checked_fwrite (buffer.get(), p - buffer.get(), f, output);
1197 db_to_linear (double db)
1199 return pow(10, db / 20);
1203 linear_to_db (double linear)
1205 return 20 * log10(linear);
1210 scale_for_display (dcp::Size s, dcp::Size display_container, dcp::Size film_container)
1212 /* Now scale it down if the display container is smaller than the film container */
1213 if (display_container != film_container) {
1214 float const scale = min (
1215 float (display_container.width) / film_container.width,
1216 float (display_container.height) / film_container.height
1219 s.width = lrintf (s.width * scale);
1220 s.height = lrintf (s.height * scale);
1228 decrypt_kdm_with_helpful_error (dcp::EncryptedKDM kdm)
1231 return dcp::DecryptedKDM (kdm, Config::instance()->decryption_chain()->key().get());
1232 } catch (dcp::KDMDecryptionError& e) {
1233 /* Try to flesh out the error a bit */
1234 string const kdm_subject_name = kdm.recipient_x509_subject_name();
1235 bool on_chain = false;
1236 shared_ptr<const dcp::CertificateChain> dc = Config::instance()->decryption_chain();
1237 BOOST_FOREACH (dcp::Certificate i, dc->root_to_leaf()) {
1238 if (i.subject() == kdm_subject_name) {
1243 throw KDMError (_("This KDM was not made for DCP-o-matic's decryption certificate."), e.what());
1244 } else if (on_chain && kdm_subject_name != dc->leaf().subject()) {
1245 throw KDMError (_("This KDM was made for DCP-o-matic but not for its leaf certificate."), e.what());